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block: fix bugs in bio-integrity mempool usage

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commit 9e9432c267 upstream.

Fix two bugs in the bio integrity code:

 use_bip_pool() always returns 0 because it checks against the wrong limit,
 causing the mempool to be used only when regular allocation fails.

 When the mempool is used as a fallback we don't free the data properly.

Signed-Off-By: Chuck Ebbert <cebbert@redhat.com>
Acked-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This commit is contained in:
Chuck Ebbert 2010-01-30 20:28:19 +01:00 committed by Greg Kroah-Hartman
parent 9648148003
commit 0ae2b7de39
1 changed files with 2 additions and 1 deletions
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3
fs/bio-integrity.c
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@ -61,7 +61,7 @@ static inline unsigned int vecs_to_idx(unsigned int nr)
static inline int use_bip_pool(unsigned int idx)
{
if (idx == BIOVEC_NR_POOLS)
if (idx == BIOVEC_MAX_IDX)
return 1;
return 0;
@ -95,6 +95,7 @@ struct bio_integrity_payload *bio_integrity_alloc_bioset(struct bio *bio,
/* Use mempool if lower order alloc failed or max vecs were requested */
if (bip == NULL) {
idx = BIOVEC_MAX_IDX; /* so we free the payload properly later */
bip = mempool_alloc(bs->bio_integrity_pool, gfp_mask);
if (unlikely(bip == NULL)) {